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Diffstat (limited to 'tests/qemu-iotests/024')
| -rwxr-xr-x | tests/qemu-iotests/024 | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/tests/qemu-iotests/024 b/tests/qemu-iotests/024 new file mode 100755 index 000000000..25a564a15 --- /dev/null +++ b/tests/qemu-iotests/024 @@ -0,0 +1,206 @@ +#!/usr/bin/env bash +# group: rw backing auto quick +# +# Rebasing COW images +# +# Copyright (C) 2009 Red Hat, Inc. +# +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see <http://www.gnu.org/licenses/>. +# + +# creator +owner=kwolf@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +status=1 # failure is the default! + +_cleanup() +{ + _cleanup_test_img + _rm_test_img "$TEST_DIR/t.$IMGFMT.base_old" + _rm_test_img "$TEST_DIR/t.$IMGFMT.base_new" + + _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT" + _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_old" + _rm_test_img "$TEST_DIR/subdir/t.$IMGFMT.base_new" + rmdir "$TEST_DIR/subdir" 2> /dev/null +} +trap "_cleanup; exit \$status" 0 1 2 3 15 + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter +. ./common.pattern + +# Currently only qcow2 and qed support rebasing +_supported_fmt qcow2 qed +_supported_proto file +_supported_os Linux + +CLUSTER_SIZE=65536 + +# Cluster allocations to be tested: +# +# Backing (old) 11 -- 11 -- 11 -- 11 -- +# Backing (new) 22 22 -- -- 22 22 -- -- +# COW image 33 33 33 33 -- -- -- -- +# +# The pattern is written twice to have both an alloc -> non-alloc and a +# non-alloc -> alloc transition in the COW image. + +echo "Creating backing file" +echo + +TEST_IMG_SAVE="$TEST_IMG" +TEST_IMG="$TEST_IMG.base_old" + +_make_test_img 1G +io_pattern writev 0 $CLUSTER_SIZE $((2 * CLUSTER_SIZE)) 8 0x11 + +TEST_IMG="$TEST_IMG_SAVE.base_new" + +echo "Creating new backing file" +echo + +_make_test_img 1G +io_pattern writev 0 $((2 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 4 0x22 + + +TEST_IMG="$TEST_IMG_SAVE" + +echo "Creating COW image" +echo + +_make_test_img -b "$TEST_IMG.base_old" -F $IMGFMT 1G +io_pattern writev 0 $((4 * CLUSTER_SIZE)) 0 1 0x33 +io_pattern writev $((8 * CLUSTER_SIZE)) $((4 * CLUSTER_SIZE)) 0 1 0x33 + +echo "Read before the rebase to make sure everything is set up correctly" +echo +io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 + +echo +echo Rebase and test again +echo +$QEMU_IMG rebase -b "$TEST_IMG.base_new" -F $IMGFMT "$TEST_IMG" +io_pattern readv $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((4 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((5 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((6 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((7 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((8 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((9 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((10 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((11 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x33 +io_pattern readv $((12 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((13 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 +io_pattern readv $((14 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x11 +io_pattern readv $((15 * CLUSTER_SIZE)) $CLUSTER_SIZE 0 1 0x00 + +echo +echo "=== Test rebase in a subdirectory of the working directory ===" +echo + +# Clean up the old images beforehand so they do not interfere with +# this test +_cleanup + +mkdir "$TEST_DIR/subdir" + +# Relative to the overlay +BASE_OLD_OREL="t.$IMGFMT.base_old" +BASE_NEW_OREL="t.$IMGFMT.base_new" + +# Relative to $TEST_DIR (which is going to be our working directory) +OVERLAY_WREL="subdir/t.$IMGFMT" + +BASE_OLD="$TEST_DIR/subdir/$BASE_OLD_OREL" +BASE_NEW="$TEST_DIR/subdir/$BASE_NEW_OREL" +OVERLAY="$TEST_DIR/$OVERLAY_WREL" + +# Test done here: +# +# Backing (old): 11 11 -- 11 +# Backing (new): -- 22 22 11 +# Overlay: -- -- -- -- +# +# Rebasing works, we have verified that above. Here, we just want to +# see that rebasing is done for the correct target backing file. + +TEST_IMG=$BASE_OLD _make_test_img 1M +TEST_IMG=$BASE_NEW _make_test_img 1M +TEST_IMG=$OVERLAY _make_test_img -b "$BASE_OLD_OREL" -F $IMGFMT 1M + +echo + +$QEMU_IO "$BASE_OLD" \ + -c "write -P 0x11 $((0 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ + -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ + | _filter_qemu_io + +$QEMU_IO "$BASE_NEW" \ + -c "write -P 0x22 $((1 * CLUSTER_SIZE)) $((2 * CLUSTER_SIZE))" \ + -c "write -P 0x11 $((3 * CLUSTER_SIZE)) $((1 * CLUSTER_SIZE))" \ + | _filter_qemu_io + +echo + +pushd "$TEST_DIR" >/dev/null +$QEMU_IMG rebase -f "$IMGFMT" -b "$BASE_NEW_OREL" -F $IMGFMT "$OVERLAY_WREL" +popd >/dev/null + +# Verify the backing path is correct +TEST_IMG=$OVERLAY _img_info | grep '^backing file:' + +echo + +# Verify the data is correct +$QEMU_IO "$OVERLAY" \ + -c "read -P 0x11 $((0 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ + -c "read -P 0x11 $((1 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ + -c "read -P 0x00 $((2 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ + -c "read -P 0x11 $((3 * CLUSTER_SIZE)) $CLUSTER_SIZE" \ + | _filter_qemu_io + +echo + +# Verify that cluster #3 is not allocated (because it is the same in +# $BASE_OLD and $BASE_NEW) +$QEMU_IMG map "$OVERLAY" | _filter_qemu_img_map + + +# success, all done +echo "*** done" +rm -f $seq.full +status=0 |